Geokhimichni osoblivosti enderbitiv Ukrayins'kogo shchita ta deyaki mirkuvannya shchodo yikhn'ogo petrogenezisu  [Geochemistry of enderbites in the Ukrainian Shield and aspects of their genesis]

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Alternate Title:Geochemistry of enderbites in the Ukrainian Shield and aspects of their genesis
Authors:Krivdik, S. G.; Zagnitko, V. M.; Tomurko, L. L.; Mineeva, V. M.; Kravchenko, G. L.; Bondarenko, I. M.; Kanunikova, L. I.; Dubina, O. V.
Author Affiliations:Primary:
Natsional'naya Akademiya Nauk Ukrainy, Institut Geokhimii, Mineralogii i Rudoobrazovaniya, Kiev, Ukraine
Volume Title:Mineralogicheskiy Zhurnal
Source:Mineralogicheskiy Zhurnal, 28(3), p.10-26. Publisher: Natsional'naya Akademiya Nauk Ukrainy, Institut Geokhimii, Mineralogii i Rudoobrazovaniya, Kiev, Ukraine. ISSN: 0204-3548
Publication Date:2006
Note:In Ukrainian with English and Russian summaries. 26 refs.; illus., incl. 5 tables
Summary:Archean enderbites of the Ukrainian Shield have been considered as restite rocks formed after removal of eutectoid melts from them at the prevailing (amphibolite) or in the beginning of granulite stage of metamorphism (K-Na granites, charnokites). Positive europium anomalies in the spectra of rare-earth elements are characteristic of them; their intensity increases at depletion of enderbites by these elements. It is evident that the depletion degree reflects the depletion of restite substrate by easily fusible elements in the process of fusion of eutectoid granitoids. Enderbites could be formed at the expense of various initial rocks; feldspar components prevailed in their composition (intermediate and acid volcanites, mainly plagioclase granitoids, sedimentary argillo-arenaceous deposits). Carbonate, alumina and basic rocks also took part in formation of enderbites, but they are hardly subject to granitization and charnokitization and most frequently remain as metamorphized restites among enderbites. Archean enderbites possess some geochemical and mineralogical peculiarities: in contrast to the same-type of Proterozoic rocks they are characterized by more magnesial pyroxenes and biotites, low content of rare-earth elements and more distinctly expressed positive europium anomalies.
Sections:Geochemistry; Petrology
Subsections:Igneous rocks
Subjects:Accessory minerals; Archean; Diorites; Enderbite; Genesis; Geochemistry; Igneous rocks; Isotope ratios; Isotopes; Major elements; Metals; Mineral composition; O-18/O-16; Oxygen; Plutonic rocks; Precambrian; Rare earths; Restites; Stable isotopes; Tonalite; Trace elements; Commonwealth of Independent States; Europe; Russian Platform; Ukraine; Ukrainian Shield
Coordinates:N450000 N510000 E0390000 E0280000
Abstract Numbers:07M/3603
Record ID:2007054838
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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